Ex-Formula 1 driver Kamui Kobayashi will race in the Japanese Super Formula in 2015.
The 28-year-old, who raced for Caterham in F1 last season, will drive for Team Le Mans after undertaking a successful test in one of the squad's Dallara-Toyota SF14s at Okayama in December.
Kobayashi takes the place of Audi World Endurance Championship driver Loic Duval alongside Ryo Hirakawa in the Team Le Mans line-up.
Italian Andrea Caldarelli joins Impul to replace Narain Karthikeyan after three seasons racing for Toyota's Lexus brand in Super GT and two starts as a stand-in in Super Formula last year.
Newcomers Kobayashi and Caldarelli will be joined in Super Formula this season by 2009 Formula Renault 3.5 champion and '13 WEC LMP2 title-winner Bertrand Baguette, who has expanded his role with the Nakajima Honda team to include a single-seater campaign as well as his Super GT assault.
Autosport has produced a standalone special magazine to celebrate our 70th birthday. All current print subscribers will receive a copy for free. To order your copy of the 196-page Autosport 70th Anniversary issue, please go to: autosport.com/autosport70th